The herbaceous Peony has been cultivated in home gardens for over 600 years. Considering the beauty of the flower and the longevity of the plants, it's no wonder why they have long been a perennial favorite. Peony clumps may survive as long as 50 years, so it is advisable to prepare the growing site very thoroughly before planting. Once established in the garden, Peony plants are reasonably free from maintenance.